U.S. Commerce Dept. @CommerceGov
RT @uspto: First professional female electrical engineer Edith Clarke received a #patent for a graphical calculator in 1925. #AmericanHeroe… — PolitiTweet.org
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Fri Jul 28 18:34:23 +0000 2017
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U.S. Commerce Dept. @CommerceGov
RT @uspto: First professional female electrical engineer Edith Clarke received a #patent for a graphical calculator in 1925. #AmericanHeroe… — PolitiTweet.org